she is the hero of the individual lost in a dystopian world. she hopes to reclaim her original identity, which was lost to society, through enlightened self-interest. she observed the value of the person.
Rand called her philosophy "Objectivism", describing its essence as "the concept of man as a heroic being, with his own happiness as the moral purpose of his life, with productive achievement as his noblest activity, and reason as his only absolute". she considered romanticism to be the approach that most accurately reflected the existence of human free will.
rand says: "I am not primarily an advocate of capitalism, but of egoism; and I am not primarily an advocate of egoism, but of reason. If one recognizes the supremacy of reason and applies it consistently, all the rest follows."

No frankly, if Ayn Rand were literate I think her ideas might have more traction. But as she writes like a steam roller makes pancakes, she only attracts flat heads to her ideology. Anyone with a brain rejects it for being primitive.

Biggest sin? Among all the others, you mean? Unoriginal? You find her works unoriginal? What is it that you really want to say about her? These veiled hostile questions are kind of skirting around it - just come out and say your complaint.